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Why is the size of stamping parts unqualified after bending?


Stamping parts are widely used metal processing products, which can be seen everywhere in life. Stamping parts processing plants will encounter some problems when processing metal stamping parts. Only by solving these problems can better production be carried out. When the stamping parts are bent, the product size will be unqualified. What is the reason? Dongguan Fortuna  will make a detailed introduction below.


1. The rebound of the raw material leads to the unqualified size of the stamping parts

Countermeasures to reduce rebound:

Using stamping raw materials with large ductility deformation coefficient and small yield limit with relatively stable physical properties.

Improve the calibration process and choose calibration bending instead of free bending;

Before bending, the raw materials should be quenched, so that the cold-hardened raw materials are softened in advance and then bent into shape;

If deformation occurs in the whole process of stamping die and cannot be removed; then the inclination of punch and die should be replaced or refurbished, and the gap between punch and die should be equal to the thickness of the material.

Enlarge the total contact area between the die and the stamping part, and reduce the total contact area between the punch and the stamping part.

Choose the method of "being lucky" to reduce the harm of rebound.

2. The positioner is damaged and deformed, and the precise positioning of the strip is prohibited. Be sure to replace it with a new positioner.

3. In the unguided bending die, when adjusting on the stamping machine, the lower dead center of the guide rail slider of the stamping machine is not properly adjusted, which will also lead to the unqualified size of the stamping and bending parts.

4. If the pressing equipment of the abrasive tool is not working or cannot hold the pressing effect at all, be sure to adjust the pressing force again or replace the compression spring to make it work normally.

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